change DEPRECATED and remove from_items from some constructor tests

Author: reidy-p

pandas/core/frame.py

@@ -1242,10 +1242,11 @@ def to_records(self, index=True, convert_datetime64=True):
     @classmethod
     def from_items(cls, items, columns=None, orient='columns'):
         """
-        DEPRECATED: from_items is deprecated and will be removed in a
-        future version. Use :meth:`DataFrame.from_dict(dict())`
-        instead. :meth:`DataFrame.from_dict(OrderedDict(...))` may be used
-        to preserve the key order.
+        .. deprecated:: 0.23.0
+            from_items is deprecated and will be removed in a
+            future version. Use :meth:`DataFrame.from_dict(dict())`
+            instead. :meth:`DataFrame.from_dict(OrderedDict(...))` may be used
+            to preserve the key order.
 
         Convert (key, value) pairs to DataFrame. The keys will be the axis
         index (usually the columns, but depends on the specified

pandas/tests/frame/test_constructors.py

@@ -1283,17 +1283,13 @@ def test_constructor_column_duplicates(self):
 
         tm.assert_frame_equal(df, edf)
 
-        with tm.assert_produces_warning(FutureWarning,
-                                        check_stacklevel=False):
-            idf = DataFrame.from_items([('a', [8]), ('a', [5])],
-                                       columns=['a', 'a'])
+        idf = DataFrame.from_records([(8, 5)],
+                                     columns=['a', 'a'])
+
         tm.assert_frame_equal(idf, edf)
 
-        with tm.assert_produces_warning(FutureWarning,
-                                        check_stacklevel=False):
-            pytest.raises(ValueError, DataFrame.from_items,
-                          [('a', [8]), ('a', [5]), ('b', [6])],
-                          columns=['b', 'a', 'a'])
+        pytest.raises(ValueError, DataFrame.from_dict,
+                      OrderedDict([('b', 8), ('a', 5), ('a', 6)]))
 
     def test_constructor_empty_with_string_dtype(self):
         # GH 9428